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  3. A compound alloy of gold and copper crystallizes in a cubic lattice in which the gold atoms

. A compound alloy of gold and copper crystallizes in a cubic lattice in which the gold atoms

occupy the lattice points at the corners of a cube and the copper atoms occupy the centres of each of the cube faces. The formula of this compound is

A. AuCu

B. Au2Cu

C. Au3Cu

D. AuCu3


 

 

Best Answer

Ans: D

Sol: 1/8 ´ 8 = 1 Au atom / unit cell

1/2 ´ 6 = 3 Cu atoms/unit cell

Empirical formula is AuCu3

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